kdepim / kontact ist working fine, but kmail was crashing and craching and crashing.
Its crashing when i choose an email
Its crashing when i make a change of the Konfiguration of kmail
Its crashing without user interaction
Its crashing when i try to set a filter
and so on, kmail is completly wrecked.

The version earlier i used with Plasma5 on Neptune (4.16.whatever) was very stable. Please take a look for this.